class_docstr: Thread that processes asynchronous writes for _AsyncWriter.
code: def stop(self):
      self._queue.put(self._shutdown_signal)
      self.join()
  
imports: import os
  import queue
  import socket
  import threading
  import time
  from tensorboard.compat import tf
  from tensorboard.compat.proto import event_pb2
  from tensorboard.summary.writer.record_writer import RecordWriter
label_desc: Use image node_id 2 for calling the _AsyncWriterThread obj's underlying member method code with example usage: obj.stop() without return types